Funding for this research was provided by:
Chinese University of Hong Kong (research accounts 6901031 and 7101215)
Text and Data Mining valid from 2018-12-01
Received: 29 August 2018
Accepted: 7 December 2018
First Online: 19 December 2018
Ethics approval and consent to participate
: This study is approved by the Clinical Research Ethics Committee of the Chinese University of Hong Kong (approval number CRE-2016.480). All patients provided written informed consent to participate in the study.
: Not applicable.
: The authors declare that they have no competing interests.
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